16_Static Random Access Memory 3080 Jiwon Chang

16_Static Random Access Memory 3080 Jiwon Chang -...

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Static Random Access Memory (SRAM) ECE 3080 Jiwon Chang
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Introduction Creates an interface with the CPU at speeds not attainable by DRAMs. Replaces DRAM in systems that requires low power consumption. Serves as cache memory interfacing between DRAMs and the CPU.
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Introduction SRAM cell consists of a bi stable flip flop connected to the internal circuitry by two transistors. SRAM cell’s data is volatile. SRAM doesn’t have a refresh periodically like DRAM since It uses a bi stable flip flop
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SRAM Cell Operation Stand By Mode Data Retention Mode Write/Read Mode
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Stand By One inverter is always ON for the 4T cell One transistor in each of the coupled inverters is OFF for the 6T cell 4T Cell 6T Cell
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Data Retention The SRAM must be supplied by a power supply that will not fluctuate beyond certain level At lower voltage, the SRAM is set to retention mode where the part is no longer accessible, but the cell will keep the data.
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Write/Read Write Operation Read Operation
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16_Static Random Access Memory 3080 Jiwon Chang -...

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